Alberta Premier Danielle Smith and three of her ministers got an earful from southern Alberta locals at a rowdy, hours-long town hall to discuss the province’s coal policy. About 500 people, dressed in cowboy hats, belt buckles, and jeans, packed a community hall in Fort Macleod, Alta., for an event marked by heckling, competing applause, and placards. The premier and her ministers of energy, environment and agriculture took questions and were shouted down on several occasions by attendees as they defended changes to the province’s coal policy. The town hall came weeks after the Alberta Energy Regulator, or AER, granted an Australia-based coal company permission to start a controversial coal exploration on the eastern slopes of the Rocky Mountains. A new study by Alberta government scientists, which has yet to…